Caliper-gage.



E. F. HATHAWAY.

CLIPER GAGE.. APPLICATION FILED JAN.6.1908.,

931,759. I Patented Aug. 24, 1909.

6 6 wnesses In venolf @YM/1. WWW/g" EqgavFHaZkaway Mm @3 W72 Mfg@ rUNF l EDGAR F. EATHAWAY, F DORCHESTER, MASSACHUSETTS.

'raaisriiaiiu'r onirica.

CAMPER-GAGE.

93 1 759. Specification of Letters Patent.

Patented Aug. 24,' 1909. Application led January 6, 1908. Serial No. 409,389.

ill)

Io all whom 'it may concern: My invention will be best understood by vBe it known thatv I, EDGAR F. Ilaria-nui', reference to the following description ot a citizen of the United States, and residing one specific embodiment iliereot, while its at Dorchester, in thecounty ot Suffolk and scope will be more particularly pointed out 5 State of Massachusetts, have invented an in the appended claims.

Improvement in Caliper-Gages, of which In the drawings Fignre l shows in .-ide die following description, in connection elevation a caliper gage for measuring outwith the accompanying drawings, is a speei- Side diameters, embodying one torni of my ieation, like numerals on the drawings repreinvention; Fig. 2. shows a similar gage for in senting like parts. measuring inside diameters: Fig. 23 is a par- My invention relates to caliper gages for tial section, on an enlarged scale, taken on measuring either inside diameters .or disthe line 3 3 in Fig'. l; Fig. 4: is a view also tanees, being intended more particularly to oir an enlarged scale of the adjustable gage provide a gage which may be adjusted so spindle; Fig. 5 is a side elevation of the seal-v as to serve at dierent times as a refering die employed iii connection with the gage F ence or Standard for different work, but shown in Fig. l: Fig. (3 is an end view there which, after adjustment to any selected conof; Fig. T is a detail sectional view showing dition cannot be ie-adjusted by any iiiiaiithe application of a lock to the'gage illusthorized person Without leaving visible evitrated in Fig. l; Fig. S is an end view ot the 2o dences ot such attempt. same; Fig. 9 is a side elevation ot' the parts In machine-shop practice it is frequent shown in Fig. T; Fig. 1() is an end view of where large numbers of duplicate parts are the sliding closure employed, with the gage finished, to provide non-adjustable gages, to oit Fig. 7 g F ig. l1 is a side elevation thereot, the measurements ot which such finished and Fig. l2 is a view showing a pin with parts must conform, which gages, however, helical grooves. ar@ expensive and are not, warranted unless Referring O tlm drawings llld t0 the 'the lscale of manufacture is extensive. illustrated embodiment of iny invention there Where a lesser number of duplicate parts shown, l have' illustrated in Fig. l a caliper are to be finished standard gages are eangage for measuring outside diameters. The 8o ployed, but the same are made adjustable, latter comprises the jaw-shaped holding so that after the completion' of -the parts memberv l having at one end the preferably upon which they are employed they may tiXed and hardened steel gagemember and be utilized for other work by a change. in at the opposite eiid a similar but adjustable adjustment. Where such "ages are made gage member 3. the latter comprising a adjustable, however, it is dih'ieult to prevent t-hreaded pin or spindle, as shown in F -L the accidental alteration ot the adjustment The adjustable gage member 3 hasl threaded through carelessness, and an accuracy being engagement with the walls of the split; often necessary within a fractional part of threaded socket portion el ot the holder l, oney one-thousandth ot' an inch, such alteraso that it may be adjusted toward or from 40 tion could not be perceived without careful the fixed gage member .2 with a suliieient measurement.. ln many cases, too, intendegree of sensitiveness or refinement tor the tional Change in adjustment is made for intended purposes of use. From soinecondipurposes o' deception. F or example, it fretions of work an adjustment ot' the interqnently happens that a workman, having vening distance between the two gage mem- -25 iinished :r piece of too small an outside bers' may be required within an accuracy ot' diameter, or too large an inside diameter, the fractional part ot' a thousaiidth ot' an will thereupon adjust the gage to correinch. After adjustment to its selected posispond, so that on inspection the eiror will tion the ga e member 2-3 is adapted to beheld appear to be that. of the gag'e and not diie iii fixed position and against displacementby to his own fault or carelessness. Y any suitable means. such as the clamping @ne object of my invention is to provide screws. which are adapted to clamp toa gage in which the selected condition of gether the split. soclet member about the adjustment cannot bealtered through carethreaded pin. lu thiscondition thcgage is lessness or intention Without leaving apadapted for use as is the ordinary adjustable 35 parent and visible evidence of such fact. caliper. lupi-der, however, to leave the gage .evidences of the attempt.

that the gage cannot be readjusted by un-A authorized persons Without leaving visible means may be employed for this purpose, but in the gage 'represented in Fi 1 the threaded gage member 3 is provided with a plurality of longitudinal rooves 6 and the socket member 4 is provided With an open pocket or recess 7 having an opening at its bottom with which the said grooves are adapted to register one by one as the pin is turned for adjustment. When the lgage is adjusted one of these grooves is left to coincide with the opening in the pocket 7. If the threads upon the adjustable gage member are so coarse that this cannot be done Without leaving the gage in a materially different adjustment from that desired, the pin may be provided with a greater number of grooves than shown, or the same may be distributed in helical fashion along the pin, or the pocketopening may be of greater extent, so that in any event the pocket may be made to coincide Withone or more longitudinally arranged depressions in the face of the screw. The gage having been' adjusted in this fashion it 'may then be left in a sealed condition by filling the bottom of the pocket with suitable fusible or other sealing material 8, such as melted lead, Babbitt metal or even lsealing Wax or the like, which latter will enter the opening in the pocket and penetrate into the grooves of the screw, so that the latter cannot be turned without breakin" the seal. The foreman or other authorized person performin this sealing-preferably applies to the sealing member 8 a suitable sealing die or member 9 to leave a permanent impression thereon. Such die member may be of any suitable character, but is preferably such as to preclude counterfeiting and being retained by the foreman or other like authorized person, the 'gage cannot thereafter be readjusted and resealed Without his knowledge or consent. 1

In Fig. 2 I have shown an inside caliper gage for measuring inside diameters aving the adjustable gage member 10 and th fixed or nonadjustable gage member v11, the two being held in the plug-shaped holder A12 in substantially' the same fashion as -are the two gage members in the jaw-shaped holder 1 of the first described gage. The gage shown in Fig. 2, therefore, requires no further description than that already given, its construction and utility being obvious from what precedes. y

Other means may be employed than the sealing material for preventing the readjustment of the gage, .and other means may also be employed than the sealing die 9 shown Any suitable justed by unauthorized ersons Without leavfor placing the gage in a condition where it cannot b'e readjusted without leaving apparentevidences of the attempt.

In Figs. 74) I have shown the adjustable member 3' provided with an adjusting 7o device, such as the rotatable threaded stud 13, held against, longitudinal movement in the socket portion 14, but adapted to be turned for adjustment of the gage member through engagement by a screw-driver with the slotted head. Suitable locking nuts '15 are provided for locking the threaded stud in position after adjustment, and the socket portion' is partially split and provided with a clamping screw 16 to clamp the gage member fast in position after adjustment.' Access is had to the slotted head of the- 4 threadedlstud through an opening in the pocket at' the rear of the. socket portion, The said pocket, however, being closed by the sliding closure 18 after adjustment has been effected. After the pocket has been closed by the sliding closure 18, the latter is then locked permanently by means of the lock'l9 which is carried by the socket portion, the locking bolt `2O thereof being adapted to entera notch 2l in the edge of the sliding closure. Readjustment of the gage by pre-` ventin access to the pocket 1 being thus eifecte the key 22 is withdrawn from the lock and 'etaired by the foreman.

In .both embodiments of my invention, therefore, as shown in Figs. l-G and Figs. 7-11, respectively, thegage cannot be admg -visible evidences o such adj{1]1Jsltment,- in the one case through the brea g of the lock, or in the other the breaking of the seal.-

' It will be obvious that my invention may be embodied in various other specific forms 1`05 than thoseshown, but that the latter being submitted for illustrative urposes only, details of construction andA orm and relative. arrangement of'parts may be widely varied without departing from the spirit ofthe ini vention.

1. An'adjustable'-rcaliper gage having a threaded socket meliiber, and a threaded adjustable gage member therein being provided also with a.r.ecess opening into the threaded walls of the socket member, and sealing material withinsaid recess engaging the threaded adjustable member said material having an exposed, impress receiving surface. l

2: An adjustable caliper gage having a threaded adjustable gage member provided with one or more grooves extending length- Wise the same, and meansI for sealing the same in any fixed position of adjustment consisting of sealing material brought into engagement with the said groove and having, when positioned, an exposed, impress rej eeiving surface. 1,30

provided with clamping screws to clamp .said adjustable gage member therein, a'nd.

with an exteriorly open recess extending 'through 'said Wall,.and sealing material in said recess adapted to be brought into contact with said gage member said sealing ma- -terial, when positioned, having an exposed,

impressreceivin surface.

5. An adjusta le caliper gage comprising 1n combinatioua holding member, an adjustable age mounted therein, said holding member aving applied thereto and in effective sealing contact- With the said adjustable gage member, an exposed body of im- -press receiving, sealing material.

6. An adjustable caliper gage having an adjustable gage member, a cavity in the face of said gage, and impress receiving sealing material introduced wholly within said cavity to seal the gage member against readjustinent, said material, when positioned Within said cavity, having an exposed, impress receiving surface.

7. A micrometer gage having an interiorly threaded, longitudinally split socket member, a threaded and longitudinally grooved gage m'ember adjustably mounted in said socket member, said socket member having a recess on the side thereof communicatingI with the interiorly threaded surface thereoffand exposing the longitudinal grooves of the gage member when the 4latter is in position, clamping means to clamp thesplit portion of the socket about the gage member, and impress receiving sealing material for filling the bottomof the recess and the exposed portion of the grooves for sealing the. gage member in any selected position of adjustment, said" material, when positioned in said recess, having an exposed, impress receiving surface.

In testimony whereof, I have signed my of .tivo subscribing witnesses.

EDGAR HATHAWAY.

Tit-nesses THOMAS B. BOOTH, Evnim'r'r S. EMERY.

vname to this specification, in thepresencel 

